Days blurred into a heated haze in the mansion, the air thick with unspoken desire. Koo’s teasing at home had only intensified—brushing her juicy ass against Taehyung’s crotch “by accident” in the hallway, bending over in front of him to pick up nothing at all, her tiny skirts flipping up to flash that perfect pink pussy. She’d whisper filthy things when Mina wasn’t looking: “Daddy, I’m so wet thinking about you,” or “I bet your cock is bigger than any boy I’ve played with.” Taehyung’s control was fraying thread by thread, his nights filled with furious strokes to thoughts of claiming his stepdaughter’s tight holes while his wife slept beside him.

But what he didn’t know—what drove him fucking insane when he finally saw it—was that Koo’s sluttiness extended far beyond their home.

It started on a sunny afternoon. Taehyung had come home early from the office, his mind already buzzing with irritation from Koo’s morning antics. She’d greeted him in nothing but an oversized t-shirt that barely covered her ass, her hard nipples poking through as she hugged him a little too long, grinding subtly against his thigh. He’d snapped at her to “put some damn clothes on,” but she’d just giggled and skipped away.

Now, pulling into the driveway, he noticed the gate to the backyard was ajar. Frowning, he stepped out of his car and walked around the side of the house, drawn by low voices and… laughter? A deep, raspy chuckle he recognized.

Their neighbor, Mr. Park—an old widower in his late 70s, silver-haired and frail but still spry enough to tend his garden—was standing by the fence that separated their properties. And there was Koo, leaning over the fence in the sluttiest pose imaginable. She wore a tiny bikini top that strained against her massive tits, the triangles barely covering her pink nipples, and denim shorts so short the bottom curves of her ass cheeks hung out. Her white skin glowed in the sunlight, pink lips curled in a wicked smile.

“Oh, Grandpa Park, you’re so naughty,” Koo purred loudly, her voice dripping with lust. She reached over the fence and blatantly palmed the bulge in the old man’s loose pants, squeezing his cock through the fabric. “Mmm, feels like someone’s happy to see me. Is this hard old dick all for little Koo?”

Mr. Park groaned, his wrinkled hands trembling as Koo grabbed one and pressed it straight onto her heaving breast. “Go on, squeeze my big titties, Grandpa. They’re so soft, aren’t they? I bet you haven’t felt tits like these in years.”

Taehyung froze behind a hedge, his blood boiling. The old perv was actually groping her—squeezing her fat tit through the bikini, thumb rubbing over her nipple until it poked out hard. Koo moaned dramatically, arching her back. Then she took his other hand and slid it down to her ass, forcing him to grab a handful of that juicy flesh. “Squeeze harder, Grandpa. I love when dirty old men play with my ass. Makes my pussy so wet.”

She was grinding against the fence now, humping it lightly while stroking his cock faster through his pants. “I’d let you fuck me right here if you weren’t so old and slow,” she teased filthily. “Bet you’d cum in thirty seconds inside my tight pink hole.”

Taehyung’s vision went red. Jealousy and rage exploded in his chest—not just at the old man, but at her. His stepdaughter, acting like a desperate horndog for some grandpa? He stormed forward.

“Koo!” His voice cracked like a whip.

She startled, pulling her hands away, but not before flashing him an unrepentant smirk. Mr. Park shuffled back, muttering excuses, but Taehyung didn’t even look at him.

“Get. Inside. Now.” Taehyung’s tone was low, dangerous, his broad frame towering as he grabbed her wrist and yanked her toward the house.

Koo pouted playfully, letting him drag her. “Aw, Daddy, don’t be mad. I was just playing…”

He didn’t speak until they were inside, slamming the back door shut. “What the fuck was that?” he hissed, pinning her against the wall with his body. His cock, traitorously, was rock-hard against her stomach.

Koo licked her pink lips, eyes gleaming. “Just having fun, Daddy. Grandpa Park gets so lonely. I like making men feel good.” She pressed her tits against his chest. “Are you jealous?”

Taehyung’s hand shot to her throat—not hard, just possessive. “You’re a shameless little slut, aren’t you? Letting any cock touch you.”

She moaned softly at his grip, her pussy throbbing. “Yes, Daddy… I am. But I’d rather it was your cock.”

He released her abruptly, stepping back, breathing hard. “Go to your room. Stay there.” He turned away before he did something he couldn’t take back.

But the images haunted him.

A few days later, it got worse.

Taehyung was driving home late, stuck in traffic, when he spotted Koo’s car parked in a secluded lot near campus. Curious—and suspicious—he pulled in a few spaces away. Through the tinted windows of her friend’s beat-up sedan, he saw movement.

Koo was in the passenger seat, head bobbing furiously in the driver’s lap. Her friend—a college guy Taehyung vaguely recognized—was groaning, hands tangled in her hair as she slurped noisily on his cock like a p*rnstar. Her massive tits were pulled out of her low-cut top, bouncing with every eager suck. She deepthroated him without gagging, drool running down her chin, then popped off to stroke him fast and messy.

“Fuck, Koo, you suck dick like a whore,” the guy grunted.

She giggled, tongue swirling around his tip. “I am a whore, baby. Now cum down my throat—I want every drop.”

Taehyung watched, frozen, as the guy bucked and exploded in her mouth. Koo swallowed greedily, licking her lips clean, then kissed the tip before tucking him away. She looked utterly satisfied, like it was just another Tuesday snack.

He drove off before she noticed him, his knuckles white on the steering wheel. His little stepdaughter was insatiable.

And then, the final straw.

One evening, Taehyung came home to find Koo lounging by the pool in a sheer white micro-bikini, the fabric clinging wetly to every curve. She was squirming in her chair, thighs pressed together, a small pink remote in her hand. Every few seconds, she’d press a button and bite her lip, a soft whimper escaping.

Taehyung stopped dead. He knew that look—knew that toy. A vibrating dildo, buried deep in her greedy pussy, buzzing away while she lounged shamelessly in broad daylight. Her fat pink lips were probably stretched around it, juices soaking the thin bikini bottom.

She noticed him watching and smiled wickedly, turning the intensity up. Her hips bucked subtly, big tits heaving as she moaned louder. “Hi, Daddy… feels so good inside me.”

He stared, cock throbbing painfully. She was shameless. Utterly, completely shameless. Walking around with a toy fucking her pussy, flirting with old men, sucking off random boys—she was a walking wet dream and a nightmare all at once.

Taehyung’s control snapped just a little further. He didn’t say anything, just turned and walked inside, slamming the door. But in his mind, dark plans were forming.

His slutty little stepdaughter needed to be taught a lesson.

And he was starting to think he was the only one who could do it properly.